Hematopoiesis

Hematopoiesis is the development of blood cells. Prenatally, hematopoiesis occurs in the yolk sack, then liver, and eventually the bone marrow. In normal adults it occurs in marrow and lymphatic tissues.

All blood cells develop from pluripotential stem cells. pluripotential cells differentiate into stem cells that are committed to three, two or one hemopoietic differentiation pathway. None of these stem cells are morphologically distinguishable, however.

Examples of the morphologically distinguishable along the different blood cell series are given below.

Erythropoiesis

Granulopoiesis

Monocyte Development

Lymphocyte Develpment

Return to Hematopathology ; Department of Pathology ; or Tulane University Medical Center .

This page is always under construction.

If you need more information, the best place on the internet to search is usually the National Library of Medicine.

Please send your comments ABOUT THE WEB PAGE to Robert McLay or John Krause .

by Robert McLay